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Regular Expression
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^(?:[A-Z][a-z]?(?:(?:<sub>)?[1-9]\d*(?:<\/sub>)?)?)+$
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SHOULD NOT MATCH: foo Foo FooBar This is a test. c<sub>2</sub>O C<sub>0</sub>O c<sub>2</sub>O C<sub>0</sub>O SHOULD MATCH: C<sub>11</sub>H<sub>8</sub>I<sub>3</sub>N<sub>2</sub>NaO<sub>4</sub> C<sub>18</sub>H<sub>20</sub>N<sub>3</sub>NaO<sub>3</sub>S C<sub>15</sub>H<sub>19</sub>N<sub>2</sub>Na<sub>3</sub>O<sub>18</sub>P<sub>2</sub> C<sub>26</sub>H<sub>44</sub>NNaO<sub>5</sub>S C<sub>18</sub>H<sub>33</sub>NaO<sub>3</sub> C<sub>16</sub>H<sub>11</sub>FNNa<sub>2</sub>O<sub>6</sub>P C<sub>5</sub>H<sub>6</sub>Na<sub>2</sub>O<sub>5</sub> C<sub>7</sub>H<sub>5</sub>NaO<sub>3</sub> C<sub>7</sub>H<sub>17</sub>NaO<sub>10</sub> C<sub>17</sub>H<sub>21</sub>Cl<sub>2</sub>F<sub>3</sub>N<sub>5</sub>Na<sub>4</sub>O<sub>12</sub>P<sub>3</sub>S<sub>2</sub> C<sub>18</sub>H<sub>22</sub>N<sub>4</sub>Na<sub>4</sub>O<sub>23</sub>P<sub>4</sub> C<sub>23</sub>H<sub>43</sub>NNaO<sub>5</sub> C<sub>6</sub>H<sub>7</sub>NaO<sub>7</sub> C<sub>6</sub>H<sub>12</sub>NaO<sub>9</sub>P C<sub>16</sub>H<sub>13</sub>N<sub>4</sub>NaO<sub>3</sub>S C<sub>17</sub>H<sub>13</sub>BrN<sub>3</sub>NaO<sub>2</sub>S C<sub>3</sub>H<sub>9</sub>NNa<sub>2</sub>O<sub>7</sub>P<sub>2</sub> C<sub>22</sub>H<sub>27</sub>FN<sub>3</sub>NaO<sub>6</sub>S C<sub>4</sub>H<sub>9</sub>NNaO<sub>5</sub>P H<sub>2</sub>Na<sub>2</sub>O<sub>7</sub>P<sub>2</sub> C<sub>10</sub>H<sub>20</sub>N<sub>2</sub>Na<sub>4</sub>O<sub>12</sub> C<sub>7</sub>H<sub>10</sub>N<sub>3</sub>NaO<sub>6</sub>S C<sub>10</sub>H<sub>11</sub>N<sub>5</sub>NaO<sub>6</sub>P C<sub>9</sub>H<sub>16</sub>N<sub>3</sub>Na<sub>2</sub>O<sub>16</sub>P<sub>3</sub> CH<sub>2</sub>Cl<sub>2</sub>Na<sub>2</sub>O<sub>6</sub>P<sub>2</sub> C<sub>4</sub>H<sub>7</sub>NaO<sub>3</sub> C<sub>4</sub>H<sub>16</sub>Na<sub>2</sub>O<sub>10</sub> FNa<sub>2</sub>O<sub>3</sub>P C<sub>6</sub>H<sub>5</sub>Na<sub>3</sub>O<sub>7</sub> C<sub>7</sub>H<sub>13</sub>NaO<sub>2</sub> C<sub>10</sub>H<sub>12</sub>N<sub>5</sub>Na<sub>3</sub>O<sub>11</sub>P<sub>2</sub> C<sub>4</sub>H<sub>5</sub>NNa<sub>2</sub>O<sub>4</sub> C<sub>14</sub>H<sub>10</sub>Cl<sub>2</sub>NNaO<sub>2</sub> C<sub>6</sub>H<sub>11</sub>NaO<sub>2</sub> C<sub>6</sub>H<sub>11</sub>Na<sub>3</sub>O<sub>12</sub>P<sub>2</sub> C<sub>9</sub>H<sub>12</sub>N<sub>5</sub>NaO<sub>4</sub> C<sub>26</sub>H<sub>44</sub>NNaO<sub>7</sub>S C<sub>14</sub>H<sub>8</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>6</sub> C<sub>19</sub>H<sub>15</sub>NNa<sub>2</sub>O<sub>7</sub> C<sub>4</sub>H<sub>7</sub>NaO<sub>3</sub> C<sub>9</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>12</sub>P<sub>2</sub> C<sub>9</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>12</sub>P<sub>2</sub> C<sub>2</sub>H<sub>5</sub>NaO<sub>4</sub>S C<sub>40</sub>H<sub>48</sub>N<sub>10</sub>Na<sub>4</sub>O<sub>17</sub> C<sub>25</sub>H<sub>18</sub>N<sub>5</sub>NaS C<sub>10</sub>H<sub>10</sub>N<sub>3</sub>NaO<sub>3</sub>S C<sub>15</sub>H<sub>17</sub>NaO<sub>3</sub>S C<sub>17</sub>H<sub>17</sub>N<sub>3</sub>Na<sub>2</sub>O<sub>8</sub> C<sub>9</sub>H<sub>14</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>10</sub>P<sub>3</sub> C<sub>20</sub>H<sub>22</sub>N<sub>10</sub>Na<sub>2</sub>O<sub>13</sub>P<sub>2</sub> C<sub>6</sub>H<sub>12</sub>NNaO<sub>4</sub>S C<sub>10</sub>H<sub>18</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>10</sub> C<sub>22</sub>H<sub>36</sub>NNaO<sub>7</sub>S C<sub>23</sub>H<sub>24</sub>FN<sub>6</sub>Na<sub>2</sub>O<sub>9</sub>P C<sub>9</sub>H<sub>16</sub>NNaO<sub>5</sub> C<sub>9</sub>H<sub>11</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>9</sub>P C<sub>35</sub>H<sub>35</sub>ClNNaO<sub>3</sub>S C<sub>10</sub>H<sub>12</sub>N<sub>4</sub>Na<sub>3</sub>O<sub>14</sub>P<sub>3</sub> C<sub>9</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>3</sub>O<sub>15</sub>P<sub>3</sub> C<sub>10</sub>H<sub>12</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>7</sub>P C<sub>6</sub>H<sub>6</sub>Na<sub>12</sub>O<sub>24</sub>P<sub>6</sub> C<sub>20</sub>H<sub>22</sub>NNaO<sub>4</sub> C<sub>10</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>4</sub>O<sub>8</sub> C<sub>10</sub>H<sub>11</sub>NaO<sub>2</sub> C<sub>8</sub>H<sub>7</sub>NaO<sub>4</sub> C<sub>24</sub>H<sub>37</sub>NaO<sub>6</sub> C<sub>20</sub>H<sub>22</sub>N<sub>10</sub>Na<sub>2</sub>O<sub>14</sub>P<sub>2</sub> C<sub>12</sub>H<sub>6</sub>NNaO<sub>3</sub> C<sub>8</sub>H<sub>13</sub>NaO<sub>2</sub>S<sub>2</sub> C<sub>5</sub>FeN<sub>6</sub>Na<sub>2</sub>O C<sub>26</sub>H<sub>46</sub>NNaO<sub>7</sub>S C<sub>6</sub>H<sub>16</sub>NNa<sub>2</sub>O<sub>12</sub>P C<sub>12</sub>H<sub>6</sub>NNaO<sub>4</sub> C<sub>10</sub>H<sub>14</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>12</sub>P<sub>3</sub> C<sub>14</sub>H<sub>4</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>8</sub> C<sub>10</sub>H<sub>12</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>6</sub>P FNa<sub>2</sub>O<sub>3</sub>P RPh<sub>2</sub>X AcO<sub>2</sub>Me C5H8 C5H8 H2O
Extraction
SHOULD NOT MATCH: foo Foo FooBar This is a test. c<sub>2</sub>O C<sub>0</sub>O c<sub>2</sub>O C<sub>0</sub>O SHOULD MATCH: C<sub>11</sub>H<sub>8</sub>I<sub>3</sub>N<sub>2</sub>NaO<sub>4</sub> C<sub>18</sub>H<sub>20</sub>N<sub>3</sub>NaO<sub>3</sub>S C<sub>15</sub>H<sub>19</sub>N<sub>2</sub>Na<sub>3</sub>O<sub>18</sub>P<sub>2</sub> C<sub>26</sub>H<sub>44</sub>NNaO<sub>5</sub>S C<sub>18</sub>H<sub>33</sub>NaO<sub>3</sub> C<sub>16</sub>H<sub>11</sub>FNNa<sub>2</sub>O<sub>6</sub>P C<sub>5</sub>H<sub>6</sub>Na<sub>2</sub>O<sub>5</sub> C<sub>7</sub>H<sub>5</sub>NaO<sub>3</sub> C<sub>7</sub>H<sub>17</sub>NaO<sub>10</sub> C<sub>17</sub>H<sub>21</sub>Cl<sub>2</sub>F<sub>3</sub>N<sub>5</sub>Na<sub>4</sub>O<sub>12</sub>P<sub>3</sub>S<sub>2</sub> C<sub>18</sub>H<sub>22</sub>N<sub>4</sub>Na<sub>4</sub>O<sub>23</sub>P<sub>4</sub> C<sub>23</sub>H<sub>43</sub>NNaO<sub>5</sub> C<sub>6</sub>H<sub>7</sub>NaO<sub>7</sub> C<sub>6</sub>H<sub>12</sub>NaO<sub>9</sub>P C<sub>16</sub>H<sub>13</sub>N<sub>4</sub>NaO<sub>3</sub>S C<sub>17</sub>H<sub>13</sub>BrN<sub>3</sub>NaO<sub>2</sub>S C<sub>3</sub>H<sub>9</sub>NNa<sub>2</sub>O<sub>7</sub>P<sub>2</sub> C<sub>22</sub>H<sub>27</sub>FN<sub>3</sub>NaO<sub>6</sub>S C<sub>4</sub>H<sub>9</sub>NNaO<sub>5</sub>P H<sub>2</sub>Na<sub>2</sub>O<sub>7</sub>P<sub>2</sub> C<sub>10</sub>H<sub>20</sub>N<sub>2</sub>Na<sub>4</sub>O<sub>12</sub> C<sub>7</sub>H<sub>10</sub>N<sub>3</sub>NaO<sub>6</sub>S C<sub>10</sub>H<sub>11</sub>N<sub>5</sub>NaO<sub>6</sub>P C<sub>9</sub>H<sub>16</sub>N<sub>3</sub>Na<sub>2</sub>O<sub>16</sub>P<sub>3</sub> CH<sub>2</sub>Cl<sub>2</sub>Na<sub>2</sub>O<sub>6</sub>P<sub>2</sub> C<sub>4</sub>H<sub>7</sub>NaO<sub>3</sub> C<sub>4</sub>H<sub>16</sub>Na<sub>2</sub>O<sub>10</sub> FNa<sub>2</sub>O<sub>3</sub>P C<sub>6</sub>H<sub>5</sub>Na<sub>3</sub>O<sub>7</sub> C<sub>7</sub>H<sub>13</sub>NaO<sub>2</sub> C<sub>10</sub>H<sub>12</sub>N<sub>5</sub>Na<sub>3</sub>O<sub>11</sub>P<sub>2</sub> C<sub>4</sub>H<sub>5</sub>NNa<sub>2</sub>O<sub>4</sub> C<sub>14</sub>H<sub>10</sub>Cl<sub>2</sub>NNaO<sub>2</sub> C<sub>6</sub>H<sub>11</sub>NaO<sub>2</sub> C<sub>6</sub>H<sub>11</sub>Na<sub>3</sub>O<sub>12</sub>P<sub>2</sub> C<sub>9</sub>H<sub>12</sub>N<sub>5</sub>NaO<sub>4</sub> C<sub>26</sub>H<sub>44</sub>NNaO<sub>7</sub>S C<sub>14</sub>H<sub>8</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>6</sub> C<sub>19</sub>H<sub>15</sub>NNa<sub>2</sub>O<sub>7</sub> C<sub>4</sub>H<sub>7</sub>NaO<sub>3</sub> C<sub>9</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>12</sub>P<sub>2</sub> C<sub>9</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>12</sub>P<sub>2</sub> C<sub>2</sub>H<sub>5</sub>NaO<sub>4</sub>S C<sub>40</sub>H<sub>48</sub>N<sub>10</sub>Na<sub>4</sub>O<sub>17</sub> C<sub>25</sub>H<sub>18</sub>N<sub>5</sub>NaS C<sub>10</sub>H<sub>10</sub>N<sub>3</sub>NaO<sub>3</sub>S C<sub>15</sub>H<sub>17</sub>NaO<sub>3</sub>S C<sub>17</sub>H<sub>17</sub>N<sub>3</sub>Na<sub>2</sub>O<sub>8</sub> C<sub>9</sub>H<sub>14</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>10</sub>P<sub>3</sub> C<sub>20</sub>H<sub>22</sub>N<sub>10</sub>Na<sub>2</sub>O<sub>13</sub>P<sub>2</sub> C<sub>6</sub>H<sub>12</sub>NNaO<sub>4</sub>S C<sub>10</sub>H<sub>18</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>10</sub> C<sub>22</sub>H<sub>36</sub>NNaO<sub>7</sub>S C<sub>23</sub>H<sub>24</sub>FN<sub>6</sub>Na<sub>2</sub>O<sub>9</sub>P C<sub>9</sub>H<sub>16</sub>NNaO<sub>5</sub> C<sub>9</sub>H<sub>11</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>9</sub>P C<sub>35</sub>H<sub>35</sub>ClNNaO<sub>3</sub>S C<sub>10</sub>H<sub>12</sub>N<sub>4</sub>Na<sub>3</sub>O<sub>14</sub>P<sub>3</sub> C<sub>9</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>3</sub>O<sub>15</sub>P<sub>3</sub> C<sub>10</sub>H<sub>12</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>7</sub>P C<sub>6</sub>H<sub>6</sub>Na<sub>12</sub>O<sub>24</sub>P<sub>6</sub> C<sub>20</sub>H<sub>22</sub>NNaO<sub>4</sub> C<sub>10</sub>H<sub>12</sub>N<sub>2</sub>Na<sub>4</sub>O<sub>8</sub> C<sub>10</sub>H<sub>11</sub>NaO<sub>2</sub> C<sub>8</sub>H<sub>7</sub>NaO<sub>4</sub> C<sub>24</sub>H<sub>37</sub>NaO<sub>6</sub> C<sub>20</sub>H<sub>22</sub>N<sub>10</sub>Na<sub>2</sub>O<sub>14</sub>P<sub>2</sub> C<sub>12</sub>H<sub>6</sub>NNaO<sub>3</sub> C<sub>8</sub>H<sub>13</sub>NaO<sub>2</sub>S<sub>2</sub> C<sub>5</sub>FeN<sub>6</sub>Na<sub>2</sub>O C<sub>26</sub>H<sub>46</sub>NNaO<sub>7</sub>S C<sub>6</sub>H<sub>16</sub>NNa<sub>2</sub>O<sub>12</sub>P C<sub>12</sub>H<sub>6</sub>NNaO<sub>4</sub> C<sub>10</sub>H<sub>14</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>12</sub>P<sub>3</sub> C<sub>14</sub>H<sub>4</sub>N<sub>2</sub>Na<sub>2</sub>O<sub>8</sub> C<sub>10</sub>H<sub>12</sub>N<sub>5</sub>Na<sub>2</sub>O<sub>6</sub>P FNa<sub>2</sub>O<sub>3</sub>P RPh<sub>2</sub>X AcO<sub>2</sub>Me C5H8 C5H8 H2O